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Post by venture on Dec 30, 2013 8:05:48 GMT
Hello, During commissioning of my 2005 49SO we ground (and re-epoxy coated) asymmetric trailing edges on both the keel and rudder (one biased to port, the other to starboard) that resolved a similar vibration. Will be pulling and inspecting rudder/bearings in a couple of months as part of offshore race prep. Regards, MC
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Post by loredo on Dec 31, 2013 9:55:58 GMT
Zanshin, thanks for your welcome! I truely hope that the vibration as discussed in this thread has a "simple" solution such as reshaping the trailing edge of the rudder. Yet, at least in my boat, that vibration must have been there since day one. How much damage has been done to the rudder and it's bearings??? Like I said, the vibration starts to become noticeable ( in my boat ) @ about 7.5K, by 9K it's strong enough to really wonder if something is coming apart anytime soon. @ 10K it sounds like a thunderstorm. Really, it's that bad... Such a strong vibration can't be good for the steering system as a whole. As a matter of fact, it starts the seem clear to me that the rudder's in the Jeanneau's often suffer damage. There's another thread on here : jeanneau.proboards.com/thread/2634/rudder-problems. Looking at the pics in that thread, the damage shown there could be very well due to the flexing the rudders undergo once the vibration starts. Thanks to Kordakis Kostas at least now I know what to look for once the boat will be on the hard. Now, I bought this boat used in 2012. During our first test ride of the boat I immediatly noticed the vibration ( sound ) and it seemd to me that it sounded like a worn cutlass bearing. It was replaced but the vibration was still there. If one does not know what's going on it takes a lot of time to nail down the origin of this vibration. Time after time, or if you prefer, vibration after vibration the possibility of damage increases. How often the previous owner did take the boat above the "critical limit" of 7.5K, I'm unable to say. Thus, I don't know how severe the damage to the steering system as a whole is already. As a result, I will have to pull the rudder and perform a very close check of the bearings and the rudder itself. That's in hopes that nothing major is wrong but right now I doubt it. That's the reason why I'm a little upset about Jeanneau. They SHOULD know that their design is flawed and remedy that! When they test a new boat, they never notice a vibration??? C'mon! sehulfb, thanks for chiming in! You don't happen to have a pic or two you could share with me? Before I start this adventure it would be great to see what others have done that seems to solve the problem! Thanks for listening to my ramblings! Loredo
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Post by Zanshin on Jan 1, 2014 12:56:45 GMT
The test for the rudder is simple, when you shake the bottom of the rudder is there any play or movement? Considering the big forces on the rudder the vibrations shouldn't be damaging, unless they get into a harmonic mode. I've learned a lot about Jeanneau rudders now, since I just replaced the bearings on mine. It took 5 people to lift the rudder yesterday! I did get a close-up picture of my trailing edge which I'll try to edit and post here which shows the asymmetric profile.
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